Just because a lot of less talented rappers make trap music doesn't mean that it's easy to create trap music. You need the correct delivery, flow, attitude and all that and Wiz simply doesn't have it. The fine line between himself and trap worked on Cabin fever, he shouldn't have gone further than that (no a&r).
I said it in the other thread, but it's really interesting that two dudes on the same level both went through major changes in their music.
One went from ass to ill, the other from ill to ass during the very same period.